Frequency and voltage control

Abstract:

When the first power systems were introduced more than a hundred years ago the controls used were very primitive and rudimentary. These systems were usually rather small, and the requirements regarding quality and stability were not as high as they are today, so the control could be performed manually in most cases. Fairly soon the end users started to put higher demands on the quality of be introduced tomeet these requirements. Furthermore, the first systemsvery often had ample stability margins, so usually no controlswere needed to guarantee stability inmost operating conditions.When the systems grew in size and the loading increased, the stability margins decreased drastically and automatic controls had to be introduced to enhance stability. A consequence of the higher demands on quality in some cases called for the installation of high-gain controllers, which actually destabilized the system, and additional controllers had to be installed to restore the desired stability margins.

Año de publicación:

2018

Keywords:

Fuente:

scopus